Smile shows your calmness and helps reduce pressure, which has nothing to do, but remember that pressure is the main factor in induced heart disease. Whenever you feel angry, try to do a few times, relax, relax, smile. There is also an additional benefit that it is difficult to continue when a party smiles.
Take angry as a machine that triggers a smile, it is very easy. After all, it is not an unpredictable emotion.
(Excerpted from the seventy eight "good habits")